Washer-manufacturing machine.



PATENTED MAY 12, 1903.

G. FRASER. WASHER MANUFACTURING MACHINE.

APPLICATION FILED OCT. 6, 1902.

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G. FRASER. WASHER MANUFACTURING MACHINE.

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No. 727,931. PA-TENTED MAY 12, 1903.v

G. FRASER.

WASHER MANUPAGTURIN G MACHINE.

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GEORGE FRASER, OF TOPEKA, KANSAS.

WASHER-MANUFACTU RING MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 727,931, dated May 12, 1903.

Application filed October 6,1902. Serial No. 126,119. (No model.) i

To all whom it ma concern:

Be it known that I, GEORGE FRASER, a citizen of the United States, residing at Topeka, in the county of Shawnee and State of Kansas, have invented a new and useful Improvement in Washer-Man ufactu ring Machines, of which the following is a specification.

My invention relates to an improved attachment for use on any suitable reciprocating power-machine to adapt it to punch washers from a metal plate forming the work inserted into the machine; and my object is to provide such an attachment of novel construction, adapting it to be conveniently applied to a machine of the variety referred to and to perform its purpose expeditiously, cheaply, and effectively.

While my improvement may be applied to any suitable machine having a proper stroke, it is preferablyapplied to the well-known socalled bulldozer, and for the sake of illustration it is shown in that connection in the accompanying drawings, in which- Figure 1 is a view in side elevation of a machine of the bulldozer type equipped with myimproved attachment; Fig. 2, a top plan view of the same; Fig. 3, a section taken at the line 3 on Fig. 2 and viewed in the direction of the arrow; Fig. 4, a view like that shown by Fig. 3, but presenting the parts of the machine and my attachment in the relative positions to which they are brought at the end of the forward stroke of the reciprocable head of the machine; and Fig. 5, a section taken at the line5 on Fig. 3 and viewed in the direction of the arrow.

The bulldozer machine illustrated being of well-known construction, description thereof in detail is not necessary in the present connection.

To the front sideof the sliding head A of the machine is bolted a block B, having secured to its base the guide-blocks r, and in which are mounted in horizontalseries punches B. These punches are hollow and circular in cross-section, with openings on in the extremities of their projecting ends, and they are removably seated in openings in the face of their supporting-block, being secured in place by set-screws b. Their forward ends punch out the washer-blanks from the work,

as hereinafter described, and thediameter' shown, or all of the same size, depending on the requirement in the matter of size of the washers.

C is a spring-bearing bar confined behind the stationary head D of the machine, and to the front side of the stationary head is bolted a block D, having openings to coincide with those in the block B for receiving the punches B,in which are confined at their rear ends by set-screws b punches F for punching out the centers of the washers, as hereinafter described.

E is a block supported on the machine in front of the block D, and through the openings in which coinciding wit-h those in the block D the forward portions of the centerpunches F extend, being surrounded therein by reciprocable washer-stripping thimbles G. The block E is rigidly secured to the bed of the machine by means of a suitable angleplate clamp c, bolted, as shown, and to the block D through the medium of binder-plates d, bolted to the upper sides of the blocks.

Behind the block E in the space between it and the block D is a stripper-bar H, underneath which is its bearing plate H and through openings in which the center punches F pass, while the rear ends of the stripping thimbles G normally abut against its face about the openings. In the forward ends of the openings in the block E are fastened, by set-screws about the operating ends of the center punches, the washer-dies'E, and a stop-plate I, having openings coincident with those in the washer-dies, is rigidly secured to the front side of the block E, leaving a space for the insertion of the work W in the form of a metal plate out of which to punch the washers.

K K are chains each carrying at one end an eyebolt h and at its opposite end a head 1'. At the eyebolts h the chains are connected, respectively, with eyebolt-lugs g on the opposite ends of the crank-armfof the machine, and by the heads t'they are connected with opposite ends of the stripper-bar H. At opposite sides of the machine are provided the release-springs L L, each connecting one end of the stripper-bar H with the corresponding end of the spring-bearing bar C.

The operation is as follows: The machine being set in motion to actuate the head A toward the position in which it is shown in Fig. 4 and the work being inserted between the stop-plate I and block E, the advance of the block B brings the punches B against the work and forces it against the washer-dies E, with the effect of punching out of the work the Washer-blanks, and the advance movement of the machine also forces the work against the projecting punches F to per forate the blanks at their centers and form the washers. The normal tendency of the springs L is to retract the stripper-bar from its forward position, (represented in Figs. 2, 3, and 5;) but it is brought to that position by the taut condition of the chains K when the head B is at the end of its backward stroke. As the head B advances the chains slacken and permit the springs to draw back the bar H from the thimbles into position to return them again. At the end of the forward movement of the head B, as shown in Fig. 4, the pressure of the formed washers against the outer ends of the thimbles G drives the latter backward and against the retracted stripper-bar H, the purpose of preparatorily moving the latter out of the way being to avoid torsional or uneven strain upon it such as would be exerted against it owing to the variation in length of protrusion of the punches B, whereby they are prevented from simultaneously engaging with the work. As the movable head B recedes in the continued operation of the machine to the rear end of its stroke by tautening the chains K it draws the stripper-bar II against the thimbles G to move them correspondingly and strip the washers otf the ends of the center punches F. The disks cut by the operation of the machine out of the centers of the blanks to form the washers enter the punches B- through their openings a, and as they accumulate therein in the repeated operation of the machine they crowd each other out of the rear open ends of these punches and drop into a cavity la, provided in the block 8 behind the punches to receive them and from which they may be removed from time to time.

The combined hollow punches and dies B should be of such relative length and should be so placed in their supporting-head as to permit only one at a time to initially engage the work. The cutting-faces of the center punches and washer-dies are ground to cause them to exert a shearing cut, and thus adapt them to accomplish a large amount of work with the expenditure of comparatively little power.

For guiding the thimbles G, particularly the larger ones, and preventing displacement thereof in moving each should be provided with a longitudinal slot Z, Figs. 3 and 4:, of a length proportionate to the length of play of the stripper-bar H to admit a stop-pin Z.

While I have for the sake of clearness confined the foregoing description to the details embodied in my improvement illustrated in the drawings, my invention is not limited to such details, since they may be variously modified and parts of the attachment may be differently combined without departure from the invention.

What I claim as new, and desire to secure by Letters Patent, is-

1. In combination with a horizontally-reciprocating head on a m achine-bed, a Washermaking attachment comprising punches supported on said head to reciprocate therewith, washer-dies stationarily supported on said bed to face and respectively register with said punches, center punches stationarily supported to coincide centrally with said washerdies, stripper-thimbles reciprocably confined about said center punches, and a spring-retracted stripper-bar separate from said thimbles and flexibly connected with said head for engaging the bar, against the resistance of its controlling-spring, with the thimbles by the backward movement of said head.

2. In combination with a machine of the character described, a washer-making attachmentcomprising a block secured to the movable head of the machine, a line of hollow punches supported on said block to project beyond its face, a block stationarily supported on the machine, washer-dies immovably supported in said stationary block to face and respectively coincide with said punches, a stop-plate secured to the face of said stationary block to form a space for the work and having openings coincident with said dies, center punches immovably supported in said stationary block to coincide centrally with said washer-dies, stripper-thimbles reciprocably confined about said center punches in their supporting block, a block rigidly secured on the machine behind and connected with said stationary block and having openings in its face into which enter the rear ends of said center punches, a stripper-bar movably confined between said two last-named blocks to abut against the rear ends of said thimbles, a spring-bearing bar confined behind the outermost rigid block, springs connecting together said spring-bearing bar and stripper-bar and yieldingly holding the latter normally from the rear ends of said thimbles, and chains connecting said stripper-bar with the movable head of the machine, to abut said bar against the thimbles by the backward movement of said head.

GEORGE FRASER.

In presence of-- ALFRED PARFITT, HIRAM DE CAMP. 

